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package spring.turbo.util.collection;

import org.springframework.lang.Nullable;
import spring.turbo.util.Asserts;

import java.util.Comparator;
import java.util.List;

/**
 * 按照对象类型排序的比较器
 *
 * @param  泛型
 * @author 应卓
 * @deprecated 使用 {@link org.springframework.util.comparator.InstanceComparator} 替代
 */
@Deprecated
public class InstanceComparator implements Comparator {

    private final Class[] instanceOrder;

    public InstanceComparator(List> instanceOrder) {
        this(instanceOrder.toArray(new Class[0]));
    }

    public InstanceComparator(Class... instanceOrder) {
        Asserts.notNull(instanceOrder);
        this.instanceOrder = instanceOrder;
    }

    @Override
    public int compare(T o1, T o2) {
        int i1 = getOrder(o1);
        int i2 = getOrder(o2);
        return (Integer.compare(i1, i2));
    }

    private int getOrder(@Nullable T object) {
        if (object != null) {
            for (int i = 0; i < this.instanceOrder.length; i++) {
                if (this.instanceOrder[i].isInstance(object)) {
                    return i;
                }
            }
        }
        return this.instanceOrder.length;
    }

}